What is the primary purpose of a transmission cooler in a school bus?

Answer: C — To prevent transmission overheating, which can lead to failure

The primary purpose of a transmission cooler in a school bus is to prevent transmission overheating, which can lead to failure. Transmission fluid plays a crucial role in lubricating the moving parts within the transmission, and as the fluid becomes too hot, it loses its effectiveness. This overheating can result in increased friction and wear, ultimately leading to transmission failure. The transmission cooler helps maintain the fluid at optimal temperatures by dissipating heat, thereby ensuring the transmission operates within its designed temperature range. This extends the life of the transmission and enhances reliability, especially in demanding driving conditions often encountered by school buses.